Andy Weir

Ryland Grace, a middle school science teacher turned reluctant astronaut, wakes up from a coma aboard a starship with no memory of his identity or mission. As his memory slowly returns, he realizes he is humanity's sole survivor on a desperate spaceflight to save Earth from an extinction-level threat. To solve the cosmic puzzle, he must rely on his scientific ingenuity and an unexpected alien ally.

A man dies in a car accident and, upon reawakening, strikes up a conversation with a god. Answers to his questions lead to an insight about the meaning of life. (imdb)

During a manned mission to Mars, Astronaut Mark Watney is presumed dead after a fierce storm and left behind by his crew. But Watney has survived and finds himself stranded and alone on the hostile planet. With only meager supplies, he must draw upon his ingenuity, wit and spirit to subsist and find a way to signal to Earth that he is alive. (imdb)